over-the-counter,adj.1. Not listed or traded on an organized securities exchange; traded between brokers and dealers who negotiate directly <over-the-counter stocks>. [Cases: Securities Regulation  35.13. C.J.S. Securities Regulation § 104.] 2. (Of drugs) sold legally without a doctor’s prescription <over-the-counter cough medicine>. — Abbr. OTC. [Cases: Health  303, 305.]

[Blacks Law 8th]